• Journal of Internet Computing and Services
• /
• v.9 no.1
• /
• pp.1-8
• /
• 2008

IETF has proposed Fast Handovers for Mobile IPv6 (FMIPv6) for efficient mobility management, FMIPv6 has no solutions to protect binding updates. Previous researches have mainly concentrated on using AAA, public cerificates or cryptographic algorithms to secure binding updates. However the approaches need a particular infrastructure or a heavy processing cost to setup secure associations for handovers. Proposed scheem provides authentication for FMIPv6 without infrasturcture and costly cryptographic algorithms by extending Return Routability Protocol. Also proposed scheme is oble to be used for various existing handover mechanisms in IPv6 network.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.30 no.7A
• /
• pp.597-602
• /
• 2005

This paper proposes an efficient multicast scheme for the hierarchical mobile IPv6(HMIPv6). If a mobility anchor point(MAP) in a new domain does not support multicasting, an entering group member cannot join the multicast group through the new MAP The group member thus keeps receiving multicast packets from its home agent(HA) using Mobile IPv6 (MIPv6). This increases the propagation delay of binding update (BU) messages. However, our scheme enables an entering group member to keep receiving packets from the old multicast MAP. It can also reduce tunneling costs, total delivery costs and handover latency. We simulated the performance of our scheme by comparing it with the seamless multicast handover in a hierarchical mobile Pv6 (M-HMIPv6) using the delivery cost and handover latency factors.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.34 no.6B
• /
• pp.615-622
• /
• 2009

In this paper, we consider the problem of applying NEMO in PMIPv6, and propose a method to support network mobility. When an MR enters a PMIPv6 domain, an MAG recognizes the MR to access using the BU message. And the MAG makes a tunnel between the MAG and the MR. The MR do not make tunnel fundamentally except for handover. Therefore, the PMIPv6 protocol needs to modify the original algorithm and the BCE data filed. However, the proposed method can use NEMO without protocol modification. To show verification, we implement our proposed algorithm with added BCE data filed using C program, and configure a testbed network. Through a network connectivity procedure, we can see that our proposed method can support network mobility within the PMIPv6 network.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.22 no.1
• /
• pp.11-24
• /
• 2012

Without a proper protection mechanism for the signaling messages to be used for the mobility support in the Proxy Mobile IPv6 (PMIPv6), it is also vulnerable to several security attacks such as redirect attack, MITM (Man-In-The-Middle) attack, replay attack and DoS (Denial of Service) attack as in Mobile IPv6. In this paper, we point out some problems of previous authentication mechanisms associated with PMIPv6, and also propose a new fast and secure authentication mechanism applicable to PMIPv6. In addition, it is also shown that the proposed one is more efficient and secure than the previous ones.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04a
• /
• pp.205-207
• /
• 2004

MIPv6(Mobile IPv6)를 확장한 새로운 이동통신 기술인 이동 네트워크 (NEtwork Mobility, NEMO)는 여러 개의 노드와 하나 이상의 이동 라우터(Mobile Router, MR)로 구성되어 네트워크 단위로 이동성을 지원한다. NEMO의 경우 여러 네트워크들이 계층적으로 이루어진 형태를 가지고 있기 때문에, 상위 네트워크와 하위 네트워크의 긴밀한 관계가 유지되어야 한다. 따라서 이동 네트워크와 자신에게 서비스를 제공해 줄 방문 네트워크상에서 상위 네트워크와의 상호인중이 보안상 무엇보다 중요하다. 본 논문은 PKI와 challenge-response를 사용한 상호인중을 제안한다. 또한, 이러한 인중에 필요한 인증서를 받기 위해서는 기존의 중앙 집중화된 인중기관의 인중서 서비스는 이동 환경에 적합하지 않으므로, secret-share 기법을 이용하여 분산화 된 환경에서 인중서 서비스를 제공하는 안전한 보안 구조를 제안한다.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.48 no.11
• /
• pp.35-43
• /
• 2011

In this paper, we propose a novel architecture for seamless mobility management to provide users with seamless Internet connection when users roam between diverse wireless local area networks (WLANS) controlled by different management entities. There have been many researches in IETF, i.e., MIPv6, HMIPv6, and PMIPv6, to provide the mobility management. However, practically since wireless access points or access routers, which are managed by an individual manager or ISP managers, have different authentication scheme and the supported mobility management, the previous mobility management protocol developed by IETF can not guarantee the quality of service of application services as the mobile node performs the handover. To solve this drawback, we propose the mobility management scheme to provide QoS-guaranteed Internet services during the handover by configurating the wireless networks which is defined by users. More specifically, we present a model, the architecture and an algorithm for user-defined network (UDN) to provide the seamless Internet service. Finally, the performance of the proposed algorithm is evaluated by the network simulation tool.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.3 no.3
• /
• pp.266-284
• /
• 2009

The challenges of rapidly growing numbers of mobile nodes in IPv6-based networks are being faced by mobile computing researchers worldwide. Recently, IETF has standardized Mobile IPv6 and Fast Handover for Mobile IPv6(FMIPv6) for supporting IPv6 mobility. Even though existing literatures have asserted that FMIPv6 generally improves MIPv6 in terms of handover speed, they did not carefully consider the details of the whole handover procedures. Therefore, in conventional protocols, the handover process reveals numerous problems manifested by a time-consuming network layer based movement detection and latency in configuring a new care of address with confirmation. In this article, we study the impact of the address configuration and confirmation procedure on the IP handover latency. To mitigate such effects, we propose a new scheme which can reduce the latency taken by the movement detection, address configuration and confirmation from the whole handover latency. Furthermore, a mathematical analysis is provided to show the benefits of our scheme. In the analysis, various parameters are used to compare our scheme with the current procedures, while our approach is focused on the reduction of handover latency. Finally, we demonstrate total handover scenarios for the proposed techniques and discussed the major factors which contribute to the handover latency.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.1030-1034
• /
• 2009

IPv6 and Ubiquitous Healthcare Environment (UHE) has become a main stream of the next generation technologies. IPv6 is designed in many ways with enhanced features such as a routing, mobility, scalability, QOS and security as a replacement of IPv4. Also, UHE is developed to provide patients with convenience and efficient healthcare services using the remote home healthcare system. However, IPv4 currently used as an Internet protocol does not have enough capability to fully support UHE. It may result in a restricted implementation of UHE. As a result, research on IPv6 implementations in UHE is increasingly becoming an issue within the healthcare industry. IPv6 has enhanced features to implement the remote healthcare system such as Neighbour Discovery process and address auto-configuration. In this paper, a basic of IPv6 and UHE will be firstly introduced and secondly, benefits brought by IPv6 in UHE will be discussed. In addition, security issues in IPv6 will be analysed to conclude this paper.

• Journal of Internet Computing and Services
• /
• v.13 no.1
• /
• pp.15-25
• /
• 2012

Mobile IPv6 (MIPv6) is a host-based protocol supporting global mobility while Proxy Mobile IPv6 (PMIPv6) is a network-based protocol supporting localized mobility. This paper makes its focus on how to reduce the longer delay and extra cost arising from the combination of authentication, authorization and accounting (AAA) and PMIPv6 further. Firstly, a novel authentication scheme (Proxy-AAA) is proposed, which supports fast handover mode and forwarding mode between different local mobility anchors (LMAs). Secondly, a cost analysis model is established based on Proxy-AAA. From the theoretical analysis, it could be noted that the cost is affected by average arrival rate and residence time.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.31 no.11B
• /
• pp.987-996
• /
• 2006

In NEMO scenarios, mobile node's variety of movements and mobile router's point of attachment changes can result in handover. This handover process needs additional time to finish due to the multiple levels of indirection involved in NEMO. And the performance issues of mobile node's handover such as handover delay and packet loss in above cases haven't been studied thoroughly. So, in this paper, we define fast handover failure cases in hierarchical mobile IPv6 network based NEMO. We briefly described NEMO architecture and handover procedures of FMIPv6 and HMIPv6. And then, we classified mobile node or mobile router's movement pattern into several scenarios. Analysis for the fast handover classified NEMO scenarios, in terms of handover latency and packet delivery cost have been performed.